Aren
/
NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

When reading a request from the kernel, only allocate as much memory 

as needed to read a request instead of the maximum message size.
Insanely enough, this makes "cheap backend I/O" file systems such
dtfs and sysctlfs perform 10-30% better (depending on the average
size of incoming requests).
This commit is contained in:
pooka 2008-01-29 14:54:08 +00:00
parent c3420b91a3
commit 04973f7441
1 changed files with 2 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
lib/libpuffs/requests.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: requests.c,v 1.22 2008/01/29 10:07:30 pooka Exp $ */
/* $NetBSD: requests.c,v 1.23 2008/01/29 14:54:08 pooka Exp $ */
/*
* Copyright (c) 2007 Antti Kantee. All Rights Reserved.
@ -30,7 +30,7 @@
#include <sys/cdefs.h>
#if !defined(lint)
__RCSID("$NetBSD: requests.c,v 1.22 2008/01/29 10:07:30 pooka Exp $");
__RCSID("$NetBSD: requests.c,v 1.23 2008/01/29 14:54:08 pooka Exp $");
#endif /* !lint */
#include <sys/types.h>
@ -65,8 +65,6 @@ puffs__fsframe_read(struct puffs_usermount *pu, struct puffs_framebuf *pb,
ssize_t n;
int lenstate;
puffs_framebuf_reserve_space(pb, PUFFS_MSG_MAXSIZE);
/* How much to read? */
the_next_level:
curoff = puffs_framebuf_telloff(pb);